Update swarm to run from the Dart Editor with demo data

samples/swarm/DataSource.dart

Index: samples/swarm/DataSource.dart
diff --git a/samples/swarm/DataSource.dart b/samples/swarm/DataSource.dart
index 042da41a7c0af69f2f8d348109cabb65255e23da..87820f351876f70327f05ed3ad6c141d7355d99a 100644
--- a/samples/swarm/DataSource.dart
+++ b/samples/swarm/DataSource.dart
@@ -31,11 +31,6 @@ class Sections implements Collection<Section> {
   // TODO(jimhug): Track down callers!
   Iterator<Section> iterator() => _sections.iterator();
 
-  // TODO(jimhug): Better support for switching between local dev and server.
-  static bool get runningFromFile() {
-    return window.location.protocol.startsWith('file:');
-  }
-
   static String get home() {
     // TODO(jmesserly): window.location.origin not available on Safari 4.
     // Move this workaround to the DOM code. See bug 5389503.
@@ -54,18 +49,14 @@ class Sections implements Collection<Section> {
     callback(new Sections(sections));
   }
 
-  static void initializeFromUrl(void callback(Sections sections)) {
-    if (Sections.runningFromFile) {
-      initializeFromData(CannedData.data['user.data'], callback);
-    } else {
-      // TODO(jmesserly): display an error if we fail here! Silent failure bad.
-      new XMLHttpRequest.get('data/user.data',
-          EventBatch.wrap((request) {
-        // TODO(jimhug): Nice response if get error back from server.
-        // TODO(jimhug): Might be more efficient to parse request in sections.
-        initializeFromData(request.responseText, callback);
-      }));
-    }
+  static void initializeFromUrl(void callback(Sections sections)) {   
+    // TODO(jmesserly): display an error if we fail here! Silent failure bad.
+    new XMLHttpRequest.get('data/user.data',
+        EventBatch.wrap((request) {
+          // TODO(jimhug): Nice response if get error back from server.
+          // TODO(jimhug): Might be more efficient to parse request in sections.
+          initializeFromData(request.responseText, callback);
+        }));
   }
 
   Section findSectionById(String id) {
@@ -202,12 +193,7 @@ class Article {
   String get thumbUrl() {
     if (!hasThumbnail) return null;
 
-    var home;
-    if (Sections.runningFromFile) {
-      home = 'http://dart.googleplex.com';
-    } else {
-      home = Sections.home;
-    }
+    var home = Sections.home;
     // By default images from the real server are cached.
     // Bump the version flag if you change the thumbnail size, and you want to
     // get the new images. Our server ignores the query params but it gets
@@ -221,15 +207,11 @@ class Article {
     if (_htmlBody !== null) return;
 
     var name = '$dataUri.html';
-    if (Sections.runningFromFile) {
-      _htmlBody = CannedData.data[name];
-    } else {
-      // TODO(jimhug): Remove this truly evil synchronoush xhr.
-      final req = new XMLHttpRequest();
-      req.open('GET', 'data/$name', false);
-      req.send();
-      _htmlBody = req.responseText;
-    }
+    // TODO(jimhug): Remove this truly evil synchronous xhr.
+    final req = new XMLHttpRequest();
+    req.open('GET', 'data/$name', false);
+    req.send();
+    _htmlBody = req.responseText;
   }
 
   static Article decodeHeader(Feed source, Decoder decoder) {